Injector



UNITED STATES PATENT OFFICE.

VVILLIAM'T. EWING, OF CHICAGO, ILLINOIS,

lnqeoToR.

SPECIFICATION forming part of Letters Patent No. 376,187, dated January 10, 1888. Application liled January 26,1887, Serial No. 225,504. (Model.)

l T0 all whom, it 19t/ay concern:

Be it known that I, WILLIAM T. EwING, a citizen of the United States, residing at Ghicago, Illinois, have invented certain new and useful Improvements iu Injectors, of which the following is a specification.

My improvement relates to that class of injectors known as lifting-injectors,7 and its object is to simplify the construction and increase the efficiency of such devices.

To this end my invention consists iu certain devices and combinations of devices, as hereinafter particularly claimed.

In the accompanying drawings I have illustrated an injector containing my invention, the principal elements entering into the con'- struction ofthe injector here illustrated being a casing inclosing the operatingparts and provided with steam and water inlets and an overflow-opening, a condensing-chambercontained within said easing and surrounding the free ends of combining and discharge nozzles and communicating with theovertlow, a main valve for regulating the supply of steam to operate the injector and having a steam aperture for admitting a small jet ot steam to prime the device, an auxiliary valve for closing said Steamaperture, and a pinand-slot connection between the main and auxiliary valves, whereby the auxiliary valve may be opened bythe rst movement of the operating-handle, and a further movement of the handle will open the main valve.

Figure l isa longitudinal section of thein-V jeetor with the steam-valves closed.l Fig. 2 is a similar view with the auxiliary valve open. Fig. Bshows the steam end of the injector with the main valve open. Fig. 4. is a transverse section of the iujectoi, taken on line 4 4 of Fig. 3. Fig..5 is an elevation of a supplementary device for connecting the combining and discharge nozzles shown in position in Fig. l. Fig. 6 is longitudinal section of the same, and Fig. 7 is a modified form ofthe steam-valves `shown in the preceding figures.

A is the easing, which is provided with a steam-inlet, B,\a water-inlet, C, and an overflow opening, D. This casing is sometimes made in two parts, indicated by the letters A and A- in thedrawings.

E is the outlet lwhich leads to the boiler.

F is the main valve, F is its seat, and f the steam-aperture through the main valve.

Gis the auxiliary valve which closes the steam-aperturef, the face of the valve being conical to tit the conical surface of the main valve.

II is a short stemon the main valve, which enters the hollow of the auxiliary valve in the construction shown in Figs. l, 2, and 3, and has in it a slot, h, as shown. A pin, I, passes through the substance of the auxiliary valve and through the slot h.

J is'the operating-handle secured upon the end of the stem K of the auxiliary valve.

L is a combining-nozzle, which, as shown in Fig. 2, is provided with perforations Z, and M is the condensing or discharge nozzle.

N is the condensingchamber which sursurrounds the free ends of the nozzles L and M, and N the portion of saidchamber above the overflow.

As shown in the drawings, the chamber N is so arranged with reference to the water-in let that the feed-water surrounds the same on its way to the suction-nozzle. In some cases I have found it expedient to so arrange the nozzle M that it shall be adjustable endwise, as shown in Fig. 2. In other eases I have found it expedient to have both nozzles xed in their position and to. use an intermediate coupling, O, (shown particularly in Figs. 5 and 6,) which is made to ride upon the nozzles L and M, and is provided with perforationsP and Q, communicating with the chamber N.

To put the injector in operation handle Jis turned, thereby drawing out the auxiliary valve G and opening the aperturejiadmitting,

a small jet of steam to prime the injector, the main valve F being held upon its seat by the pressure of the steam upon its extended face4 until the pin I has traversed the'length of the slot, when the further turning of the handle in the same direction will open the main valve and sufcient steam be admitted to force water to the boiler.

The above particular description is intended to explain the construction ofthe injector illustrated iu the drawings. In the practical operation of such an injector it will be found exeeedingl y simple. The working parts are all arranged in an axial line, which arrangement ICO is of itself an element of utility. The construction and arrangement of valves herein set forth enables even a novice to operate the injector; but my object has been to secure the most thorough condensation of steam with the least expenditure of power, and at the same time render the operative parts as simple as consistent with this object,and therefore I have provided the con(lensing-chamber as a means to this better condensation of steam. I prefer to place the feed-water opening so that the Water will flow around the condensing-chamber N, whose walls are madethin, so as to be readily cooled by the contact. The steam not condensed in the eonibining-nozzlc will pass through the tirst vent, as the perforations P or l, and, striking the Walls ofthe chamber" N, will be cooled and condensed and taken u p by the condensing or discharge nozzle. Ol course this condensingchamber is applicable to non-lifting injectors.

It will be observed that this condensing-nozzle enters the condensing chainber N for a considerable portion of its length, so that it may be surrounded by the cool feed-Water. I prefer to malte the overliow with constrieted sides, as shown, and it may be provided with an ordinary vertical check-valve opening outward, in which case said valve will act as a cushion against any baclcpressure from the boiler, and the overflow being closed the steam not condensed may also till the space above the overilow-that is, the chamber N-from whence it will be drawn by thejet of Water entering the discharge-nozzle. '.l he nozzle M may be made adjustable, as shown in Fig. 2, or stationary, and the coupling O may be used, if desired, or the suction-nozzle may be provided with perforations, as shown, and this coupling dispensed with. As shown, the coupling O is arranged to be self-adjusting by the action of the steam; but it may also be made stationary, the limit of its play, when made adjustable, being from the position shown in Fig. 1 up against the shoulders o o. For usc with muddy waters or those containing inerustating material, I prefer to make the injector with the suctionnozzle, (shown in Fig. 2,) omitting the coupling G and making the nozzle M stationary, as shown in Fig. l; but I do not desire to confine my invention to the use of any particular form or adjustment of nozzles so long as said nozzles communicate with the condensing-chainber herein shown.

I do not here claim the valve construction above described, as I intend to make this feature the subject oi a separate application.

I claim* 1. In an injector, the combination of a condensing-chamber located in the feed-water passage, but closed thereto and communicating with the overllow, asnction or combining nozzie communicating with said chamber, anda discharge or condensing nozzle also communicating with said chamber, substantially as set forth.

2. In an injector, the combination of a condensing-chamber located in the feed-\vater pas sage, but closed thereto and communicating with the overflow, a suction or combining nozzle opening into said chamber and also communicating with it by apertu res near the point where it enters said chamber, and a condensing or discharge nozzle opening ont of said chamber, substantially as set forth.

WILLIAM T. EWING.

Witnesses:

James T. Hain, C. C. LINTHICUM. 

